<template>
  <div class="sidebar">
    <el-menu class="sidebar-el-menu" :default-active="onRoutes" :collapse="collapse" background-color="#334256"
             text-color="#ffffff" active-text-color="#20a0ff" router>
      <template v-for="item in items">
        <template>
          <el-menu-item :index="item.index" :key="item.index">
            <i :class="item.icon"/>
            {{ item.title }}
          </el-menu-item>
        </template>
      </template>
    </el-menu>
  </div>
</template>

<script>
import bus from "../assets/js/bus";

export default {
  data() {
    return {
      collapse: false, // 菜单不折叠
      items: [
        {
          icon: 'el-icon-s-home',
          index: 'Info',
          title: '系统首页'
        },
        {
          icon: 'el-icon-user',
          index: 'Consumer',
          title: '用户管理'
        },
        {
          icon: 'el-icon-mic',
          index: 'Singer',
          title: '歌手管理'
        },
        {
          icon: 'el-icon-headset',
          index: 'Song',
          title: '歌曲管理'
        },
        {
          icon: 'el-icon-document',
          index: 'SongList',
          title: '歌单管理'
        },
        {
          icon: 'el-icon-video-camera',
          index: 'Video',
          title: '视频管理'
        },
      ]
    }
  },
  computed: {
    onRoutes() {
      return this.$route.path.replace('/', '');
    }
  },
  created() {
    // 通过Bus进行组件间的通信，来折叠侧边栏
    bus.$on('collapse', msg => {
      this.collapse = msg;
    })
  }
}
</script>

<!-- scoped：仅用于当前vue -->
<style scoped>
.sidebar {
  display: block;
  position: absolute;
  left: 0;
  top: 70px;
  bottom: 0;
  background-color: #334256;
  overflow-y: scroll;
}

.sidebar::-webkit-scrollbar {
  width: 0;
}

.sidebar-el-menu:not(.el-menu--collapse) {
  width: 150px;
}

.sidebar > ul {
  height: 100%;
}
</style>